Harry was just thinking that all he needed was for Dumbledore's pet bird to die while he was all alone in the office with it, when the bird burst into flames.
J. K. RowlingAnd Hermione was struggling to her feet in the wreckage, and three red-headed men were grouped on the ground where the wall had blasted apart. Harry grabbed Hermione's hand as they staggered and stumbled over stone and wood. 'No - no - no!' someone was shouting. 'No! Fred! No!' And Percy was shaking his brother, and Ron was kneeling beside them, and Fred's eyes stared without seeing, the ghost of his last laugh still etched upon his face.
J. K. RowlingWe let off a Dungbomb in the corridor and it upset him for some reasonโ" "So he hauled us off to his office and started threatening us with the usualโ" "โdetentionโ" "โdisembowelmentโ
J. K. Rowling